No, he is talking about an a/c idler pulley. They run about 30 or 40 brand new and the bolt will run you no more than 5 dollars at your local Honda or Acura dealership. If you do not have the bolt, chances are you don't have the spacer for the back of it either. I would say your best bet is to get a new one from say Carquest or Discount/Advance, that way you know you'll get a long life out of it because the bearing cages are known to break apart in those things causing the pulley to freeze up and burn up belts, which isn't something you want in the dead of summer when you plan on having working a/c. I know, I have been there. Once you have the pulley, go to an Acura dealership and have them show you a breakdown of the a/c idler pulley assembly to find out what you do and no not have. There are things you can buy used for cars all day long and have no problems with them but a simple item such as a pulley isn't something I would buy used.